smclkmanagerp.nc

tinyos2.0版本驱动

/* -*- mode:c++; indent-tabs-mode: nil -*-
 * Copyright (c) 2007, Technische Universitaet Berlin
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 *
 * $Revision: 1.2 $
 * $Date: 2007/03/10 22:03:48 $
 */

/**
 * 
 * @author: Andreas Koepke <[e-mail]>
 */

module SmclkManagerP {
    uses {
        interface Boot;
        interface ClkDiv;
    }
}
implementation {
    event void Boot.booted() {
        ;
    }

    async event void ClkDiv.startDone() {
        atomic {
            BCSCTL1 &= ~XT2OFF;
            BCSCTL2 = SELS;
        }
    }

    async event void ClkDiv.stopping() {
        uint16_t sr;
        atomic {
            BCSCTL1 |= XT2OFF;
            BCSCTL2 = DIVS1;
            sr = READ_SR;
            sr &= ~SR_SCG1;
            __asm__ __volatile__( "bis  %0, r2" : : "m" (sr) );
        }
    }
}